I guess you heard about this. Most people think it was just a stunt and don't like it. I thought about it and decided that this is really a positive story...just not the way most would think. To think we can now put complete idiots into space and bring them back with a very high degree of confidence and safety is showing the real progress is being made in developing space travel. I mean, the hardest part of any flight by any vehicle is the take off and the landing. The flight in-between is usually uneventful. So now we are good enough to take any 5 random morons and fly them into space and back safely. This is a good thing as we couldn't do that before. Imagine Apollo 13 with "those" passengers. It would have been a disaster.
I'm not exactly sure why you assume that success of this one mission means there won't be a catastrophic Apollo 13-type event in the future with a crew 100% incapable of dealing with the simplest of issues. I mean, we had years of successful space shuttle missions. Then we had the Challenger explosion in 1986 and the Columbia explosion in 2003.